This is for Windows Vista and Windows 7 users only. Windows Xp does not have the shadow copy feature so those users are out of luck here. Also if you do not have system restore turned on then this solution does not apply to you either.

"From time to time, Windows® VistaTM creates point-in-time copies of your files. This allows you to retrieve older versions from files you accidentally deleted or altered. This service is turned on by default on all versions of Windows® VistaTM, but Microsoft grants access to these copies only in Ultimate, Business, and Enterprise editions. This is where ShadowExplorer comes into play. For more information on Shadow Copy, visit Microsofts website."